Speed of 2 Pole Motor
Ns=(120 x Frequency)/Number of Poles
Ns=(120×50)/2=3000 RPM
Speed of 4 Pole Motor
Ns=(120 x Frequency)/Number of Poles
Ns=(120×50)/4=1500 RPM
Speed of 8 Pole Motor
Ns=(120 x Frequency)/Number of Poles
Ns=(120×50)/8=750 RPM
1) The synchronous speed of a 2, 4 and 8 poles motor at 50 Hz can not be
Answer is:
1000 R.P.M.
Explanation:
Related Polyphase Induction Motors MCQ - Electrician (Set-1) with Answers
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12
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by increasing the rotor resistance
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